Subject: [Boost-bugs] [Boost C++ Libraries] #4608: boost::regex accepts invalid regular expressions like "\\d++"
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-08-29 07:34:44
#4608: boost::regex accepts invalid regular expressions like "\\d++"
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Reporter: gyk.net <gyk.net@â¦> | Owner: johnmaddock
Type: Bugs | Status: new
Milestone: To Be Determined | Component: regex
Version: Boost 1.44.0 | Severity: Problem
Keywords: regex |
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In programming languages that don't support possessive quantifier,eg.
Python and C#,"\d++" is considered as an illegal nested quantifier.And in
boost::xpressive,"\\d++" will raise a runtime exception.However,it's valid
in boost::regex.
{{{
wchar_t* s = L"abc123" ;
wregex e(L"\\d+++", boost::regex::normal) ;
wcmatch m ;
if(regex_search(s, m, e)){
wcout << m[0] << endl ;
}
}}}
The output is 123.
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/4608> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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